The 1 liter version of the American DJ F4L Eco Fog Fluid is designed for events, theater, and special effects applications. Composed of filtered water and pharmaceutical grade ingredients, the juice is run through a water-based fog machine and produces billowing white clouds of smoke. The fog is useful for revealing the intensity and color of light and laser beams in your special effects display. The eco version of the fog fluid is less dense and dissipates faster than the premium version.